Mitsubishi Eclipse Workshop Manual page 122

13-58
FUEL
-
On-vehicle lnspection
of
MPI Components
TROUBLESHOOTING HINTS
Hint
l:
lf the barometric pressure sensor is faulty. poor driveability is caused at high altitude, in particular.
Hint
2:
lf the
pressure indication of the
barometric pressure sensor drops significantly during high
speed
driving, check the air cleaner
for
clogging.
INSPECTION
Using Multi-use Tester
(MUn
C
o
Function
Item
No. Data display Check condition
Altitude
Standard value
Data reading
25
Sensor
pressure
lgnition sruitch:
ON
0m(0ft.)
760
mmHg
6OO
m (1.969
ft.)
7lO
mmHg
1.200 m (3.937
ft.)
660
mmHg
1.800 m (5.906
ft.)
610
mmHg
HARNESS INSPECNON
Check
for continuity of the
earth
circuit.
.
Air
flor
sensor connector:
Disconnected
tr
Repair
the
harness.
(@B-
EEO)
Check
for open-circuit or short-circuit
to
earth
betreen the
barometric
pressure sensor
and engine control
unit.
.
Air florv sensor connector:
Disconnected
.
Engine
control unh connector:
Disconnected
Repair
the
harness.
(@E-EB)
(@El-Eg)
Measure
the
impressed
wltage.
.
Air
flor
sensor connector:
Disconnected
.
Engine
control unit
connector:
Connected
.
lgnhion sruitch:
ON
Volttgp
M
4,A-6.2
Replacc
the
engrn0
control
unit
c
o
@
Mitrubishi
MotorCo.porrtlon
Apr. 1991
PmrE9010